1 /*

     2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.nashorn.internal.ir;

    27 

    28 import jdk.nashorn.internal.ir.visitor.NodeVisitor;

    29 import jdk.nashorn.internal.runtime.Source;

    30 

    31 /**

    32  * Loop representing do while loops. This is mostly split from WhileNode

    33  * because of the different order of the Phi Traversals

    34  *

    35  */

    36 public class DoWhileNode extends WhileNode {

    37 

    38     /**

    39      * Constructor

    40      *

    41      * @param source     the source

    42      * @param token      token

    43      * @param finish     finish

    44      */

    45     public DoWhileNode(final Source source, final long token, final int finish) {

    46         super(source, token, finish);

    47     }

    48 

    49     /**

    50      * Copy constructor

    51      *

    52      * @param doWhileNode source node

    53      * @param cs          copy state

    54      */

    55     protected DoWhileNode(final DoWhileNode doWhileNode, final CopyState cs) {

    56         super(doWhileNode, cs);

    57     }

    58 

    59     @Override

    60     protected Node copy(final CopyState cs) {

    61         return new DoWhileNode(this, cs);

    62     }

    63 

    64     @Override

    65     public Node accept(final NodeVisitor visitor) {

    66         if (visitor.enterDoWhileNode(this) != null) {

    67             body = (Block)body.accept(visitor);

    68             test = test.accept(visitor);

    69 

    70             return visitor.leaveDoWhileNode(this);

    71         }

    72 

    73         return this;

    74     }

    75 

    76     @Override

    77     public void toString(final StringBuilder sb) {

    78         sb.append("while (");

    79         test.toString(sb);

    80         sb.append(')');

    81     }

    82 }